| /* |
| * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_RUNTIME_JAVA_HPP |
| #define SHARE_VM_RUNTIME_JAVA_HPP |
| |
| #include "runtime/os.hpp" |
| |
| // Register function to be called by before_exit |
| extern "C" { void register_on_exit_function(void (*func)(void)) ;} |
| |
| // Execute code before all handles are released and thread is killed; prologue to vm_exit |
| extern void before_exit(JavaThread * thread); |
| |
| // Forced VM exit (i.e, internal error or JVM_Exit) |
| extern void vm_exit(int code); |
| |
| // Wrapper for ::exit() |
| extern void vm_direct_exit(int code); |
| |
| // Shutdown the VM but do not exit the process |
| extern void vm_shutdown(); |
| // Shutdown the VM and abort the process |
| extern void vm_abort(bool dump_core=true); |
| |
| // Trigger any necessary notification of the VM being shutdown |
| extern void notify_vm_shutdown(); |
| |
| // VM exit if error occurs during initialization of VM |
| extern void vm_exit_during_initialization(Handle exception); |
| extern void vm_exit_during_initialization(Symbol* exception_name, const char* message); |
| extern void vm_exit_during_initialization(const char* error, const char* message = NULL); |
| extern void vm_shutdown_during_initialization(const char* error, const char* message = NULL); |
| |
| /** |
| * Discovering the JDK_Version during initialization is tricky when the |
| * running JDK is less than JDK6. For JDK6 and greater, a "GetVersion" |
| * function exists in libjava.so and we simply call it during the |
| * 'initialize()' call to find the version. For JDKs with version < 6, no |
| * such call exists and we have to probe the JDK in order to determine |
| * the exact version. This probing cannot happen during late in |
| * the VM initialization process so there's a period of time during |
| * initialization when we don't know anything about the JDK version other than |
| * that it less than version 6. This is the "partially initialized" time, |
| * when we can answer only certain version queries (such as, is the JDK |
| * version greater than 5? Answer: no). Once the JDK probing occurs, we |
| * know the version and are considered fully initialized. |
| */ |
| class JDK_Version VALUE_OBJ_CLASS_SPEC { |
| friend class VMStructs; |
| friend class Universe; |
| friend void JDK_Version_init(); |
| private: |
| |
| static JDK_Version _current; |
| static const char* _runtime_name; |
| static const char* _runtime_version; |
| |
| // In this class, we promote the minor version of release to be the |
| // major version for releases >= 5 in anticipation of the JDK doing the |
| // same thing. For example, we represent "1.5.0" as major version 5 (we |
| // drop the leading 1 and use 5 as the 'major'). |
| |
| uint8_t _major; |
| uint8_t _minor; |
| uint8_t _micro; |
| uint8_t _update; |
| uint8_t _special; |
| uint8_t _build; |
| |
| // If partially initialized, the above fields are invalid and we know |
| // that we're less than major version 6. |
| bool _partially_initialized; |
| |
| bool _thread_park_blocker; |
| bool _pending_list_uses_discovered_field; |
| bool _post_vm_init_hook_enabled; |
| |
| bool is_valid() const { |
| return (_major != 0 || _partially_initialized); |
| } |
| |
| // initializes or partially initializes the _current static field |
| static void initialize(); |
| |
| // Completes initialization for a pre-JDK6 version. |
| static void fully_initialize(uint8_t major, uint8_t minor = 0, |
| uint8_t micro = 0, uint8_t update = 0); |
| |
| public: |
| |
| // Returns true if the the current version has only been partially initialized |
| static bool is_partially_initialized() { |
| return _current._partially_initialized; |
| } |
| |
| JDK_Version() : _major(0), _minor(0), _micro(0), _update(0), |
| _special(0), _build(0), _partially_initialized(false), |
| _thread_park_blocker(false), _post_vm_init_hook_enabled(false), |
| _pending_list_uses_discovered_field(false) {} |
| |
| JDK_Version(uint8_t major, uint8_t minor = 0, uint8_t micro = 0, |
| uint8_t update = 0, uint8_t special = 0, uint8_t build = 0, |
| bool thread_park_blocker = false, bool post_vm_init_hook_enabled = false, |
| bool pending_list_uses_discovered_field = false) : |
| _major(major), _minor(minor), _micro(micro), _update(update), |
| _special(special), _build(build), _partially_initialized(false), |
| _thread_park_blocker(thread_park_blocker), |
| _post_vm_init_hook_enabled(post_vm_init_hook_enabled), |
| _pending_list_uses_discovered_field(pending_list_uses_discovered_field) {} |
| |
| // Returns the current running JDK version |
| static JDK_Version current() { return _current; } |
| |
| // Factory methods for convenience |
| static JDK_Version jdk(uint8_t m) { |
| return JDK_Version(m); |
| } |
| |
| static JDK_Version jdk_update(uint8_t major, uint8_t update_number) { |
| return JDK_Version(major, 0, 0, update_number); |
| } |
| |
| uint8_t major_version() const { return _major; } |
| uint8_t minor_version() const { return _minor; } |
| uint8_t micro_version() const { return _micro; } |
| uint8_t update_version() const { return _update; } |
| uint8_t special_update_version() const { return _special; } |
| uint8_t build_number() const { return _build; } |
| |
| bool supports_thread_park_blocker() const { |
| return _thread_park_blocker; |
| } |
| bool post_vm_init_hook_enabled() const { |
| return _post_vm_init_hook_enabled; |
| } |
| // For compatibility wrt pre-4965777 JDK's |
| bool pending_list_uses_discovered_field() const { |
| return _pending_list_uses_discovered_field; |
| } |
| |
| // Performs a full ordering comparison using all fields (update, build, etc.) |
| int compare(const JDK_Version& other) const; |
| |
| /** |
| * Performs comparison using only the major version, returning negative |
| * if the major version of 'this' is less than the parameter, 0 if it is |
| * equal, and a positive value if it is greater. |
| */ |
| int compare_major(int version) const { |
| if (_partially_initialized) { |
| if (version >= 6) { |
| return -1; |
| } else { |
| assert(false, "Can't make this comparison during init time"); |
| return -1; // conservative |
| } |
| } else { |
| return major_version() - version; |
| } |
| } |
| |
| void to_string(char* buffer, size_t buflen) const; |
| |
| static const char* runtime_name() { |
| return _runtime_name; |
| } |
| static void set_runtime_name(const char* name) { |
| _runtime_name = name; |
| } |
| |
| static const char* runtime_version() { |
| return _runtime_version; |
| } |
| static void set_runtime_version(const char* version) { |
| _runtime_version = version; |
| } |
| |
| // Convenience methods for queries on the current major/minor version |
| static bool is_jdk12x_version() { |
| return current().compare_major(2) == 0; |
| } |
| |
| static bool is_jdk13x_version() { |
| return current().compare_major(3) == 0; |
| } |
| |
| static bool is_jdk14x_version() { |
| return current().compare_major(4) == 0; |
| } |
| |
| static bool is_jdk15x_version() { |
| return current().compare_major(5) == 0; |
| } |
| |
| static bool is_jdk16x_version() { |
| return current().compare_major(6) == 0; |
| } |
| |
| static bool is_jdk17x_version() { |
| return current().compare_major(7) == 0; |
| } |
| |
| static bool is_jdk18x_version() { |
| return current().compare_major(8) == 0; |
| } |
| |
| static bool is_gte_jdk13x_version() { |
| return current().compare_major(3) >= 0; |
| } |
| |
| static bool is_gte_jdk14x_version() { |
| return current().compare_major(4) >= 0; |
| } |
| |
| static bool is_gte_jdk15x_version() { |
| return current().compare_major(5) >= 0; |
| } |
| |
| static bool is_gte_jdk16x_version() { |
| return current().compare_major(6) >= 0; |
| } |
| |
| static bool is_gte_jdk17x_version() { |
| return current().compare_major(7) >= 0; |
| } |
| |
| static bool is_gte_jdk18x_version() { |
| return current().compare_major(8) >= 0; |
| } |
| }; |
| |
| #endif // SHARE_VM_RUNTIME_JAVA_HPP |